/*
 * @Author: gxx
 * @QQ:1278255275
 * @Date: 2021-04-07 19:18:26
 * @Last Modified by: gxx
 * @Last Modified time: 2021-04-07 19:18:26
 * @Description: 二维数组操作
*/

#include <iostream>
#include <string>
#include <cmath>
#include <algorithm>
#include <vector>

using namespace std;

int main(int agrc, char ** agrv){
    
    
    return 0;   
}